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inverter programming, provides seamless support for
loads. The system also allows
the operator to request that
the batteries be equalized in
charge and enables the storage system to respond to real
and reactive power commands from the utility, helping the utility test its smart-grid control algorithms.

The intelligent energy stor-age system along with the dis-patchable generators create ahigh-reliability feeder, whichcan detect faults and islandthe medium voltage feed-er, helping to improve servicereliability. Inside the high-reliability zone, a 2.5-mile smart feed-er system provides reliable power for residential, commercial andlight industrial customers. Additionally, the energy storage systemhas suffcient capacity to support the microgrid for several min-utes, creating a backup power supply.

In 2012, this system was at the forefront of smart grid technologies that are helping build the intelligent DERs of today while continuing to deliver value for the utility’s customers.

Today: Fast-tracking Energy Storage in Southern California

In Southern California, energy storage systems from two different developers totaling about 39.5 MW were built in late 2016
to provide critical grid support and capacity services. The frst,
a 2-MW/8-MWh project in Irvine was part of the Southern California Edison 2016 Aliso Canyon Energy Storage Resources
Adequacy (RA) Only solicitation.

The second 30-MW/120-MWh system was built in Escondido
with a third, 7.5-MW installation in El Cajon.